@@LOCK_TIMEOUT (Transact-SQL)

**APPLIES TO:** ![yes](media/yes.png)SQL Server (starting with 2008) ![yes](media/yes.png)Azure SQL Database ![no](media/no.png)Azure SQL Data Warehouse ![no](media/no.png)Parallel Data Warehouse

Returns the current lock time-out setting in milliseconds for the current session.

Topic link icon Transact-SQL Syntax Conventions

Syntax

@@LOCK_TIMEOUT

Return Types

integer

Remarks

SET LOCK_TIMEOUT allows an application to set the maximum time that a statement waits on a blocked resource. When a statement has waited longer than the LOCK_TIMEOUT setting, the blocked statement is automatically canceled, and an error message is returned to the application.

@@LOCK_TIMEOUT returns a value of -1 if SET LOCK_TIMEOUT has not yet been run in the current session.

Examples

This example shows the result set when a LOCK_TIMEOUT value is not set.

SELECT @@LOCK_TIMEOUT AS [Lock Timeout];  
GO

Here is the result set:

Lock Timeout  
------------  
-1

This example sets LOCK_TIMEOUT to 1800 milliseconds and then calls @@LOCK_TIMEOUT.

SET LOCK_TIMEOUT 1800;  
SELECT @@LOCK_TIMEOUT AS [Lock Timeout];  
GO